Dillon and Cassie bought their house twelve years ago for $275,000. Their mortgage is a 30 -year mortgage at 4.75% interest compounded monthly. a. What is the amount of their monthly payments? (3) b. What is the current balance on their loan? (3) They have the option to refinance the mortgage at 2.875% for 20 years and are considering whether it would be a good idea. c. If they choose to refinance, what would their payments be for the new mortgage? (3) They like the idea of the lower payment but are also concerned that this option would mean that it would take two additional years to pay off the mortgage. d. If they stay with their original loan, what